clintons ' new year 's vacation included stay at casa de campo , where sen. bob menendez spent time with salomon melgen , the wealthy donor at the center of his criminal charges .
bill clinton 's previous visits to casa de campo included at least one trip where he stayed with melgen , according to the doctor 's former secretary .
power couple stayed there with alfy fanjul , a billionaire sugar baron who owns the resort and played a small part in the monica lewinsky scandal .
dominican newspaper reported that they discussed hillary 's presidential ambitions .
melgen has contributed $ 8,600 to hillary clinton 's senate and presidential campaigns .